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Table 1 Descriptive characteristics of the participants by age group and sex

From: Obesity-associated poor muscle quality: prevalence and association with age, sex, and body mass index

 Young adults/adults (18–44 years)Middle-aged/older adults (45–74 years)
Men (n = 51)Women (n = 41)p-valueMen (n = 49)Women (n = 62)p-value
Age (years)34.0 ± 8.130.1 ± 8.40.02654.1 ± 7.756.5 ± 7.50.098
BMI (kg·m− 2)42.2 ± 4.241.6 ± 5.10.55342.2 ± 4.643.7 ± 5.90.198
Muscle mass (kg)38.0 ± 4.324.5 ± 2.7< 0.00137.1 ± 4.822.7 ± 2.8< 0.001
STS time (s)16.1 ± 5.515.0 ± 4.80.30417.7 ± 5.322.4 ± 8.60.001
Muscle power (W)418 ± 155326 ± 116< 0.001361 ± 125222 ± 89< 0.001
Specific power (W·kg− 1)11.0 ± 3.913.2 ± 5.20.0159.7 ± 2.99.7 ± 4.10.939
Muscle strength (kg)46.0 ± 10.626.5 ± 6.6< 0.00143.5 ± 8.822.0 ± 6.6< 0.001
Specific strength (kg·kg− 1)1.21 ± 0.261.07 ± 0.290.0281.18 ± 0.220.96 ± 0.27< 0.001
  1. Data are mean ± SD. The p-values correspond to the comparison between sexes
  2. Abbreviations: BMI body mass index, STS sit-to-stand